On 16/01/2026 15:41, Sean Christopherson wrote:
On Fri, Jan 16, 2026, Rick P Edgecombe wrote:
On Fri, 2026-01-16 at 15:02 +0000, Nikita Kalyazin wrote:
TDX does some clearing at the direct map mapping for pages that
comes from gmem, using a special instruction. It also does some
clflushing at the direct map address for these pages. So I think we
need to make sure TDs don't pull from gmem fds with this flag.
Would you be able to give a pointer on how we can do that? I'm not
very familiar with the TDX code.
Uhh, that is a good question. Let me think.
Pass @kvm to kvm_arch_gmem_supports_no_direct_map() and then return %false if
it's a TDX VM.
Sounds good to me, thanks.
